docs: def git_push():
      """
      Push new version and corresponding tag to origin
      :return:
      """
  
      # get current version
      new_version = version.__version__
      values = list(map(lambda x: int(x), new_version.split('.')))
  
      # Push to origin new version and corresponding tag:
      # * commit new version
      # * create tag
      # * push version,tag to origin
      local('git add pynb/version.py version.py')
  
      local('git commit -m "updated version"')
      local('git tag {}.{}.{}'.format(values[0], values[1], values[2]))
      local('git push origin --tags')
      local('git push')